1/*
2 * Copyright (c) 2021-2023 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 *     http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16import ObjectUtil from "./ObjectUtil"
17
18/**
19 * 字符串工具类
20 */
21export class ArrayUtil {
22  public static readonly INDEX_INVALID: number = -1;
23
24  /**
25   * 判断array是否为空
26   *
27   * @param collection collection
28   * @return boolean
29   */
30  public static isEmpty<T>(array: T[]): boolean {
31    if (ObjectUtil.isNullOrUndefined(array)) {
32      return true;
33    }
34    return array.length === 0;
35  }
36
37  /**
38   * 判断array是否包含item
39   *
40   * @param array
41   * @param item
42   */
43  public static contains<T>(array: T[], item: T): boolean {
44    if (this.isEmpty(array) || ObjectUtil.isNullOrUndefined(item)) {
45      return false;
46    }
47    return array.indexOf(item) !== this.INDEX_INVALID;
48  }
49
50  /**
51   * 查找 array 中最大值
52   * @param array
53   */
54  public static max(array: number[]): number {
55    return Math.max.apply(null, array);
56  }
57
58  /**
59   * 查找 array 中最小值
60   * @param array
61   */
62  public static min(array: number[]): number {
63    return Math.min.apply(null, array);
64  }
65}
66